Burner for illuminating-gas



(No Model.)

C. A. SHAW.

BURNER POR ILLUMINA'IING GAS.

Patented June 26 UNITED STATES i PATENT OFFICE.

p CHARLES ALBERT SHAW, on REvERE, MASSACHUSETTS.

SPECIFICATION forming part of Letters Patent No. 522,088, dated June 26, 1894.

Application filed January 4, 1894:. Serial No. 495,670.v (No model.) u

To al? whom it may concer-n:

Be 1t known that I, CHARLES ALBERT SHAW, of Revere, in the county of Suffolk, State' of Massachusetts,have invented certain new and useful Improvements in Burners for Illuminating Gas, of whichthe following is a description sufficiently full, clear, and exact to enable any person skilled in the art or science to which said invention `appertains to make and use the same, reference beingV had to the accompanying drawings, forming part of this specification, in which- Figure lis an enlarged vertical transverse sectionl of my improved gas burner, the tips and coil being Shown in side elevation; Fig. 2 a like View illustrating a modification; and Flg. 3 a vertical longitudinal section of -the -upper member of the expansion chamber,

I spending parts in the different figures of' the.

showing the outer or larger tip formed integral therewith.

Like letters of reference indicate corredrawings.

My lnvention relates especially to burners for illuminatlng gas, the obj ect being particu- -larly to reduce-the pressure at the tip while improving combustion and thereby effecting a saving ot' the gas.

In the drawings, A represents the socket piecewhich is tubular in form and interiorly screw-threaded at, l), to enable it to be attached to a nipple or pipe; and B the expans10n chamber. The expansion chamber is preferably formed of two members, cl, f, connected by a gas-tight joint or Seam at, g, and may be of any suitable shape. The'upper portion of the socket piece, A, is turned down to form a shoulder at, z, and exteriorly Screwthreaded at, le, the lower member, f, of the chamber, B, being provided with an opening at, m, and interiorly screw-threaded to receive said socket-piece.

A tip, C, is disposed in the upper .end of the socket-piece, A. This tip has a Small oritice or is of small capacity, usuallyr of the ordinary one foot size or Smaller, and when 1n position projects into the chamber, B. The chamber is provided with an opening at, sv, in the ordinary manner; and inserted in this opening thereis a tip, D, which has a larger orifice or is of greater capacity than the tip, C, the relative proportions of the tips being preferably as four to one, this being varied, however, according to circumstances.

Theptips are detachable, and may be constructed of either lava or metal; but, if desired, the tip, C, may be formed integral with the socket-piece, A, and the tip, D, integral with the member, d, of the chamber, B, the latter construction being shown at, D2, in Fig. 3.

Near the joint, g, an annular groove, h, is formed in the member, d, of the chamber, B.

A,wire,"H, coiled spirally in the form of a hollow cone, has its base inserted in the groove, h, its apex, t', being disposed centrally near the inner end of the tip, D. The coils ofV the wire are sufficiently separated to permit the passage of the gas between them. The small tip, C, when in position preferably projects slightly into the coil, H, as shown in Fig. l.

For convenience of reference I designate the tip, C, the inlet tip and the tip, D, the outlet tip.

In the use of my improvement, the current or stream of gas passingthrough the inlet tip, C, strikes the coil, I-I, being thereby deiiected or turned outwardly between the sections of the coil and caused to impinge against the inner walls of the chamber, B, as shown by the arrows in Fig. l. The gas being ignited at the tip, D, the chamber, Bis heated therefrom and the heat is imparted to the gas within said chamber. The coil, H, being disposed within the chamber and connected therewith, also has heat imparted toit which,in turn, is imparted to the gas, thus greatly assisting in heating and expanding the same. The coil also serves to retard the flow of gas through the chamber and assist in reducing the pressure at the point of combustion. The gas passes through the inlet tip at its normal pressure, but being diffused in the chamber, B, its flow retarded by the coil, H, and also additionally heated and expanded by Said coil, as described, is delivered to the outlet tip, D, under less than the normal pressure, but ina condition to ignite more readily and produce a given amount of light with less gas than when -it is not so diffused, retarded,l

IOO

coil, H2, is disposedthereimin an inverted position with its apex, ft2, near the discharge orifice of the inlet tip, C; but this form of the burner elects substantially the same results as are accomplished by that shown in Fig. 1.

It will be obvious that the interior heatradiating surface of the burner chamber will be greatly increased by the employment of the coil as described; also that the coil may be supported within the. chamber by any suit.- able means,l as. for instance, indentationsmay bemadein the chamber to form projections on its interior by which `the coil may be supported 'instead of the groove.

Having thusexplained my invention, what I claim is.-

1. A gas burner comprising an expansion chamber, an outlet tip therefor, an inlet tip projecting into said chamber, and of less capacity thansaid outlet tip and a cone-shaped wire coildisposed between said tips and extending substantially from one tip to the socketvpiece and detachable therefrom, and j a` metallic auxiliary-heater for the gas disposed between said tips, substantially as described.

4. A gas burner comprising an expansion chamber having an inner annulargroove and provided with inlet and outlet tips, and a coneshaped wire coil disposed Abetween said inlet and outlet tips, the base of said cone resting in said annular groove and the apex thereof beingdisposed centrally in said chamber adjacent to the inner opening of one of said tips, substantially as described.

5. In a gas burner, the combination of an expansion chamber provided with an outlet tip, a detachable socket-piece, an inlet tip at the inner end of said socket-piece of less capacityr than the outlet tip and normally disposed Within said chamber, and a cone-shaped wire coil disposed in `said chamber between said tips and terminating at its oppositeends adjacent to`- said tips, substantially as. described.

6..In agas burner, the` combination et an `expansion chamber having an-annulai'groove and provided with inlet and outlet: tips, the

i inlettipibeing of less capacity than-the outlet tip, and acone-shaped wire coil disposedibe- 1 tween said tips,the base of said cone resting in said annular` groove and` the apex` thereot` being disposed centrally `near the` innen end of the` inletv tip, substantially` as described.`

7. In a gas burner, the combination ot1 an Iexpansion chamber provided withan outlet 4 tip,.an interiorlydisposed annulargroovefand an interiorlyscrewthreaded opening, atubui lar socketpiece interiorly` and` exteriorly lscrewthreaded,` said socket piece being turned into said opening in thel body and provided with an inlettip at its inner end offless 'capacity than said outlet tip, anda cone.- shaped wire coil disposed between said tips,

substantially as described.

CHARLES ALBERT SHAW. Witnesses:

KATHiiaINE` DURFEE, A. M. CROWE. 

